Hesham Sakr presented this record breaking result at CLEO Munich last week. The team made a NANF fibre to guide high power laser light in the 1µm region which demonstrates the lowest loss of any hollow core fibre at this wavelength.
We report the fabrication of a 439 m length of Nested Antiresonant Nodeless Hollow-Core fibre (NANF) for the 1 µm wavelength region. This is useful for applications such as high peak power delivery. The fabricated NANF shows a record low loss of 2.53 dB/km at 1100 nm and 2.78 dB/km at 1070 nm. Whilst these results are extremely encouraging we believe they leave a significant margin for further improvements both in fiber yield and loss values.
H. Sakr, G. T. Jasion, T. D. Bradley, Y. Chen, J. R. Hayes, I. A. Davidson, H-C. Mulvad, L. Xu, D. J. Richardson, and F. Poletti, “Record Low Loss Hollow Core Fiber for the 1μm region”, CLEO Munich 2019